Public bug reported: I experienced a soft lockup on a Thinkpad Gen2 AMD laptop recently after upgrading to Ubuntu 26, when it was stable on Ubuntu 24 for a long time.
After a bit of digging, I think Kernel 7.0.0-28 and later contains b2ed01e7ad3d which introduce a problem fixed by https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/3db7d7d583419f7b1f2e141e36418802dbb25cf8 (drm/ttm: fix swapped-out resources never leaving their bulk_move range). In Ubuntu's changelog, the bug-introducing commit ("drm/ttm: Fix ttm_bo_swapout() infinite LRU walk on swapout failure") arrived in 7.0.0-28. The fix doesn't appear anywhere up to my current 7.0.0-38, and apt shows no newer kernel available. Can this change be backported into Ubuntu 26 please? ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-38-generic 7.0.0-38.38 ProcVersionSignature: Ubuntu 7.0.0-38.38-generic 7.0.14 Uname: Linux 7.0.0-38-generic x86_64 ApportVersion: 2.34.1-0ubuntu0.1 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sat Oct 10 09:18:37 2026 InstallationDate: Installed on 2026-02-16 (235 days ago) InstallationMedia: Ubuntu 24.04.4 LTS "Noble Numbat" - Release amd64 (20260210) MachineType: LENOVO 20XF009AUK ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-38-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash mem_sleep_default=deep resume=UUID=b0c7cfe0-d4f0-4105-b540-038f4214e7c5 resume_offset=77760512 crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M SourcePackage: linux UpgradeStatus: Upgraded to resolute on 2026-10-03 (7 days ago) dmi.bios.date: 04/16/2026 dmi.bios.release: 1.37 dmi.bios.vendor: LENOVO dmi.bios.version: R1NET67W (1.37) dmi.board.asset.tag: Not Available dmi.board.name: 20XF009AUK dmi.board.vendor: LENOVO dmi.board.version: SDK0T76538 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.ec.firmware.release: 1.37 dmi.modalias: dmi:bvnLENOVO:bvrR1NET67W(1.37):bd04/16/2026:br1.37:efr1.37:svnLENOVO:pn20XF009AUK:pvrThinkPadT14sGen2a:rvnLENOVO:rn20XF009AUK:rvrSDK0T76538WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20XF_BU_Think_FM_ThinkPadT14sGen2a:pfaThinkPadT14sGen2a: dmi.product.family: ThinkPad T14s Gen 2a dmi.product.name: 20XF009AUK dmi.product.sku: LENOVO_MT_20XF_BU_Think_FM_ThinkPad T14s Gen 2a dmi.product.version: ThinkPad T14s Gen 2a dmi.sys.vendor: LENOVO ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug resolute wayland-session -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2170429 Title: Soft lockup after hibernate on AMD GPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2170429/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
